[harrab]

PHYSICS 16 SIMPLE HARMONIC MOTION AND PENDULUM

http://www.youtube.com/playlist?list...XopSBVUxQHGoee

PHYSICS 17 WEIGHT AND TENSION

http://www.youtube.com/playlist?list...QHvTivxqriBU2P

PHYSICS 18 GRAVITY

http://www.youtube.com/playlist?list...ET7nex7bZIt1oX

PHYSICS 19 MECHANICAL WAVES

http://www.youtube.com/playlist?list...tnEu5EZZGF8kQD

PHYSICS 20 SOUND AND SOUND WAVES

http://www.youtube.com/playlist?list...NKf3LbfB73gkn8